Glossary
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Manual, 09/2008, A5E02191071-01
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Downloading to the programming device
Uploading of load objects (e.g. code blocks) from the load memory of the central processing
unit into the programming device.
Function blocks (FBs)
Function blocks are components of the user program and are, according to IEC standard,
"blocks with memory". The memory for the function blocks is an allocated data block, the
"instance data block". Function blocks can be configured, i.e. you can use them with and
without parameters.
Hardware
Hardware is the entire physical and technical equipment of a programmable controller.
Instance data block
The instance data block is a block allocated to a function block, which contains data for this
special function block.
Interrupt
Interrupt is a term that designates the interruption of the processing of a program in the
processor of a programmable controller by an external alarm
Module
Modules are pluggable PCBs for programmable controllers.
Module parameters
Module parameters are values with which the behavior of the module can be set. There are
two different types of module parameters: static and dynamic.
Online Help
STEP 7 provides you with the option of having context-dependant help texts displayed on
the screen while you are working with the programming software.
Online/Offline
When you are online there is a data connection between the programmable controller and
programming device, when you are offline there is no data connection between them.
Operand
An operand is part of a STEP-7 instruction and states with which unit the process should
execute something. It can be addressed both absolutely and symbolically.
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